Peterv
Active Member
I've been chasing an annoying miss when accelerating and idling for a little while now.
New plugs, Leads, cap, rotor arm, swapped the coil, cleaned all connectors. Just the Lumenition ignition system to go.
Traced the wiring, earth good, negative good, positive goes to the coil positive. Coil a 12 volt one.
Just a minute.... Cant see a separate 12 volt feed, just the factory wires (2 x yellow+white).
Better measure the voltage with the ignition on... 7.2 volts. . Most of you will know where I'm going with this.....
Seems like whoever installed the Luminition system missed a vital detail with their handy work. An ignition system and fancy coil isn't going to solve any problems if you don't bypass the coil resistor wire. They don't like working at 7.2 volts. (although obviously they can, just, and has been for many many years).
I replaced the coil with a new NGK bypass resistor type and extended the 12 volt for the ignition to a very near by suitable source.
I wanted to keep the factory bypass system as it's there for a very good reason and keeps the engine bay wiring looking smart.
No more misses, and hopefully no more sooting up of the plugs. (another symptom if idling too long.)
Cheers, Peter
New plugs, Leads, cap, rotor arm, swapped the coil, cleaned all connectors. Just the Lumenition ignition system to go.
Traced the wiring, earth good, negative good, positive goes to the coil positive. Coil a 12 volt one.
Just a minute.... Cant see a separate 12 volt feed, just the factory wires (2 x yellow+white).
Better measure the voltage with the ignition on... 7.2 volts. . Most of you will know where I'm going with this.....
Seems like whoever installed the Luminition system missed a vital detail with their handy work. An ignition system and fancy coil isn't going to solve any problems if you don't bypass the coil resistor wire. They don't like working at 7.2 volts. (although obviously they can, just, and has been for many many years).
I replaced the coil with a new NGK bypass resistor type and extended the 12 volt for the ignition to a very near by suitable source.
I wanted to keep the factory bypass system as it's there for a very good reason and keeps the engine bay wiring looking smart.
No more misses, and hopefully no more sooting up of the plugs. (another symptom if idling too long.)
Cheers, Peter